1. D.S. Ariyarathne, B.K.K.K. Jinadasa, S.B.N. Ahmad,
Evaluation of Importance of Orinoco Sailfin Catfish (Pterygoplichthys multiradiatus) as a Food Source
D.S. Ariyarathne, B.K.K.K. Jinadasa, S.B.N. Ahmad,
J.H.K.N. Jayawardena and I. Wickramasinghe ,M.R Perera
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

2. Results and Discussion Conclusion References Acknowledgements
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
overview
Introduction
Objectives
Materials and methods
Results and Discussion
Conclusion
References
Acknowledgements
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

3. Evaluation of Importance of Orinoco OSC (P
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Introduction
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka

4. Evaluation of Importance of Orinoco OSC (P
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Introduction
Inland fish production makes a significant contribution to the livelihood of rural population in Sri Lanka.(Total fish production 486,170 Mt Inland and Aquaculture 68,950 Mt-2012 /MFARD)
Fish species called as Orinoco Sailfin Catfish  (Pterygoplichthys multiradiatus) has been invaded natural freshwater ecosystems.
Local distribution - Ragama lake, Polgolla reservoir, Kala wewa and Madampe lake (Epa and De Silva, 2013).
Negative impacts
Decrease fishing efficiency.
Displace native fish species.
Hazard to predaceous birds.
Males excavate tunnels along banks.
Consuming as a food - Brazil, Colombia and other countries (Palacios et al., 2010)
68 950
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

5. Objectives Main Objective - Specific Objectives -
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Objectives
Main Objective -
To evaluate the importance of Orinoco Sailfin Catfish as a food source.
Specific Objectives -
To determine the flesh yield
To determine the proximate composition
To determine the fatty acid profile
To analyze the trace metal accumulation
To evaluate the consumer preference
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

6. Materials and Method Introduction Institute of Post Harvest Technology
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Materials and Method
Introduction
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka

7. Evaluation of Importance of Orinoco OSC (P
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Materials
Freshly caught Orinoco Sailfin Catfish (OSC) / (Tank cleaner –local name ) and Thilapia fish collected from fresh water reservoir in Ampara district on 05th October were transported with ice to the fish processing unit in IPHT / NARA
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

8. Methodology Orinoco Sailfin Catfish Tilapia
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Orinoco Sailfin Catfish
Tilapia
Collection of fish: Ampara district
Fillets
Flesh yield
Fillets
Flesh yield
Proximate analysis
Trace metal analysis
(AAS method)
Preparation of salted dried fish
Preparation of salted dried fish
Moisture
(AOAC )
Sensory evaluation
Sensory evaluation
Protein
(AOAC )
Fat
(AOAC )
Fatty acid analysis
(AOAC )
Ash (AOAC )
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

9. Determination of flesh yield
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Determination of flesh yield
Fish ( g)
Weighing of whole weight
De-heading, gutting & skinning off
Selected OSC fish samples
Separation of fillets & mince
Weighing of total flesh
Selected tilapia samples
Calculation
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

10. Preparation of salted dried fish
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Preparation of salted dried fish
Thilapia
Orinoco Sailfin Catfish
Fish
Washing & Filleting
Thilapia
Orinoco Sailfin Catfish
Salting (fish : salt /4:1 ratio)
Salting
Sun drying
12 hours
Removing excess salt
Sun drying
Salted dried OSC
4 days
Salted dried Thilapia
Packing
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

11. Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
Sampling & sample analysis
Sample type
Sample size
Flesh yield
10 Number of fishes (weight range g )
Proximate composition
20 samples for each parameter
Fatty acid analysis
05 samples
Trace metal analysis
24 Number of fishes
Sensory evaluation
28 numbers of untrained panel
Statistical analysis were carried out using
Minitab – Kruskal-Wallis test
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

12. Result and discussion Introduction
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Result and discussion
Introduction
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka

13. Source for Thilapia: Chaijan, 2011
Evaluation of Importance of Orinoco OSC (P. multiradiatus) as a Food Source
Proximate composition for the flesh of Orinoco Sailfin Catfish & Thilapia
Number of samples = 20
Moisture & Protein%
Fat & Ash%
Source for Thilapia: Chaijan, 2011
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

14. Determination of flesh yield Orinoco Sailfin Catfish
Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
Determination of flesh yield
Orinoco Sailfin Catfish
Thilapia
Number of fish = 10
Weight range = 300–600g
Flesh yield of OSC= 31 ± 2.98%
Flesh yield of Thilapia = 42 ± 4.47%
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka

15. Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
Fatty acid profile
Number of samples = 5
SFA : 44% (Tetradecanoic, pentadecanoic, palmitic and stearic)
MUFA : 22% (Palmitoleic, oleic, vacceneic and eruceic)
PUFA : 34% (Linoleic, linolenic, arachidonic, docosapentaenoic and docosahexaenoic)
SFA/UFA ratio : 1/1.3
MUFA/PUFA ratio : 1/1.5
Omega 3 : 20% (Linolenic, docosapentaenoic and docosahexaenoic (DHA))
Omega 6 : 14% (Linoleic and arachidonic)
ω-6/ω-3 ratio : 1/1.4 - Beneficial to health (Simopoulos, 2002).
DHA – 13% (Orinoco Sailfin Catfish), DHA – 2% (Tilapia) (Ugoala et al., 2008).
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

16. Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
Trace metal analysis
Trace metal
Content (μg/kg)
SL standard level (μg/kg)
(GOVSL, 2007) Cd
5.6 ± 4.4 50 Pb
42.0 ± 25.0
200 Hg
48.0 ±124.0
500
Total fish = 24
Number of males = 15
Number of females = 9
Weight range = g
Variation of Cadmium content with sex group
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

17. Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
Sensory evaluation results
Mean separation value = 38.22
Significant difference:
Difference of A.R > Mean separation
No significant difference:
Difference of A.R < Mean separation a b
a - Highest average rank – Sample 438 (Salted dried Orinoco Sailfin Catfish)
b - Lowest average rank – Sample 482 (Boiled Orinoco Sailfin Catfish
Differences of average ranks
Sample name
code
428
435
465
482
468
438
Boiled tilapia -
30.2
29.3
10.1
20.3
33.5
Fried tilapia
0.9
40.3
9.9
3.3
Salted dried tilapia
39.4
9.0
4.2
Boiled OSC
30.4
43.6
Fried OSC
13.2
Salted dried OSC
Pair wise significantly
different Samples
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka

18. Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
Conclusion
Maximum Flesh yield of Orinoco Sailfin Catfish was about 31%.
Moisture, protein, fat and ash contents of Orinoco Sailfin Catfish were about 81%, 18%, 0.58% and 1.12%, respectively.
Fish oils of Orinoco Sailfin Catfish were beneficial for human health according to the high content of PUFA and specially, DHA.
The safety of Orinoco Sailfin Catfish as a food source in satisfactory level according to the lower contents of Cd, Pb and Hg than the Sri Lankan standard levels in fish for export.
Salted dried Orinoco Sailfin Catfish fillets had the highest consumer preference according to the sensory evaluation.
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

19. Evaluation of Importance of OSC(P. multiradiatus) as a Food Source
References
Chaijan M. (2011). Physicochemical changes of tilapia (Oreochromis niloticus) muscle during salting. Food Chemistry, Pp
Epa U.P.K., and De Silva T.W.J.T. (2013). Identification of invasive alien sailfin catfish in Sri Lanka based on morphological characteristics. University of Kelaniya.
Palacios C.M., Valdez C.A., Scott P., and Ross L. (2010). Tentative solutions to an alien species invasion from aquarium aquaculture. University of stirling.
Simopoulos A.P. (2002). The importance of the ratio of omega-6/omega-3 essential fatty acids. Biomed Pharmacother, Pp
Ugoala, Chukwuemeka, Ndukwe and Audu. (2008). Comparison of Fatty Acids Profile of Some Freshwater and Marine Fishes. Internet Journal of Food Safety, Pp
GOVSL. (2007, December 17). Maximum limits for Lead (Pb), Cadmium (Cd) and Mercury (Hg) in fish and fishery (No: 1528/7). The gazette of the democratic socialist republic of Sri Lanka.
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

20. Evaluation of Importance of OSC(P. multiradiatus) as a Food Source
Acknowledgments
I would like to thank IIFET and UNU FTP for selecting my abstract and funded me to participate and present this conference.
And my sincere gratitude goes to all who helped me in successful completion of the project, specially, Dr. Indira Wickramasinghe Mr. Kolitha Jinadasa Mrs. Shakeela Ahamad ,Mr. J.kosala , Mr. Ruchitha ,Mr. Thissa and all other staff members of NARA .
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .

21. Evaluation of Importance of OSC (P. multiradiatus) as a Food Source
THANK YOU
Institute of Post Harvest Technology
National Aquatic Resources Research and Development Agency (NARA). Sri Lanka .